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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Oct. 31, 2018
Oct. 31, 2017
Income Tax Disclosure [Abstract]    
Deferred tax assets, Compensation and benefit accruals $ 7,767 $ 11,158
Deferred tax assets, Bad debt and other allowances 426 605
Deferres tax assets, Capital loss and tax credit carry-forwards 12,295 13,398
Deferred tax assets, Net operating losses (domestic and foreign) 202,643 282,022
Deferred tax assets, Deferred license revenue 4,765 7,850
Deferred tax assets, Inventory valuation allowances 238 111
Deferred tax assets, Accumulated depreciation 4,374 5,095
Deferred tax assets, Grant revenue 910 1,522
Deferred tax assets, Gross 233,418 321,761
Deferred tax assets, Valuation allowance (231,403) (321,761)
Deferred tax assets after valuation allowance 2,015 0
Deferred tax liability, In process research and development (2,356) (3,377)
Deferred Tax Liability, Net $ (341) $ (3,377)